DefinePK

Abstract

A design model was developed for the prediction of CBR values of lateritic soil treated with metakaolin. The laboratory test carried out on the lateritic soil showed that the soil was classified as A-7-5(4) or CL according to the American Association of State Highway and Transportation Officials classification system (AASHTO) and Unified Soil Classification System (USCS), respectively. Tests carried out included index test, compaction, California bearing ratio and unconfined compressive strength. Generally, the results showed that the use of metakaolin at varying percentages improved the strength properties of the treated soil. From the laboratory results, six out of the eleven data sets were used for the calibration of model while the remaining five were used for the validation. Comparing the measured and predicted California bearing ratio, the model gave a good coefficient of determination (R2) of 0.9257. This signifies that the model can be used in soil stabilization and prediction of CBR values.